The supervolcano that lies beneath Yellowstone National Park might have erupted less powerfully but more frequently than previously thought... In the ancient past, the supervolcano at Yellowstone led to some of the largest-known continental eruptions in Earth's history. Each of the world's roughly one dozen supervolcanoes is capable of spewing up to thousands of times more magma and ash than any eruption ever recorded in human history. Scientists now find that the biggest Yellowstone eruption — the fourth-largest known to science, which created the 2-million-year-old Huckleberry Ridge deposit — was actually at least two different eruptions that occurred about 6,000...